A device which controls the voltage and current being delivered to a capacitor or battery.

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0answers
37 views

How to choose a charger [on hold]

I'm trying to make a quadricopter. I choose all my material but I don't find charger for my battery. Here it is : http://www.studiosport.fr/3d-robotics-batterie-lipo-pour-iris-p-4846.html I would ...
0
votes
1answer
36 views

Schmitt trigger design to control lead acid battery charger

I've found a very good explanation on schmitt trigger circuit design here -What is a Schmitt Trigger and its application exactly? But the design is done considering same reference voltage and the ...
0
votes
0answers
40 views

Handmade usb charger

I am a mechanical engineer and I don't have so many knowledge on electronics. I tried to make a solar charger . I had a 12v12ah battery,a solar panel 20w, a battery charger and a dc-dc converter ...
0
votes
2answers
67 views

Li-Ion battery charging as simple as possible

I have read articles here and there about charging Li-Ion batteries. Most of them try to solve the problem of maximizing capacity and also maximizing cycles. The most recommended method is charging ...
0
votes
1answer
64 views

Name of the Samsung Galaxy end of charger [closed]

This is probably a weird question to ask but I am looking for the end "jack" of the Samsung Galaxy S3, S4 etc charger name. Is not the USB side of the cable, is the actual bit which goes inside the ...
0
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0answers
16 views

Would this be a suitable replacement? (Power adaptor) [duplicate]

I've been scouring the internet for a solution to my problem, but to no avail. I hope I'm posting this in the right section too. So I have a TV which won't turn on, and I have determined its because ...
0
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0answers
33 views

PWM lithium-ion charger

I want to make a custom lithium-ion 18650 standard cell charger as I will be charging 100s of them (recycling old laptop batteries). Base on my research, lithium-ion cells use constant-current, ...
0
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2answers
79 views

charging battery directly from a source, what could go wrong?

I have a 100A lead acid deep cycle battery and also have a car's 12V 100A charger (alternator with AVR) At 1500RPM the alternator will produce nearly 100A.. and the battery is directly connected to ...
0
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0answers
20 views

charge controller not disconnecting at full

When testing batteries and charge controllers I stumbled into something, this is what I found: 12V 100A battery charged using solar system with a charge controller in between, at 13.4V or ...
0
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0answers
29 views

Does the battery protection circuitry work automatically within this Li-Ion charger IC (STNS01)?

I want to use the STNS01 Li-Ion Charger/LDO regulator in my circuit for its protection circuitry including overcurrent, overdischarge, overcharge, and over temperature circuitry. However, I can't ...
-2
votes
1answer
48 views

Connecting OverCharging kit with charger [closed]

I Have one battery of 12V and 3.5 A. I purchased charger whose output is 12V and 3A. I also purchased overcharging kit. But dont know how to connect the overcharging kit with charger. You can see pics ...
0
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0answers
50 views

2S LiPo Charger IC With Built-In Boost (allowing 5V voltage supply)

So before I get to my question, I wanted to give a bit of background info on what I am working with. Basically I have a device which is USB powered. It has an ATMega32u4, and two SN754410 H-Bridge ...
1
vote
1answer
72 views

Prevent Mobile over charging?

This is my second time changing my mobile because I forgot it all the night on the charger. I know there is an IC or circuit inside my phone that will disconnect the charger once the battery is fully ...
2
votes
2answers
69 views

How to make USB smartphone charger? [duplicate]

I want to make a USB cell phone charger. I know USB operates in 5 volts which means i need to drop down voltage if i have battery potential greater than 5 Volts. I have 12 volts sealed lead acid ...
0
votes
0answers
19 views

Help with solar panel/battery & load calculations

First solar project and I've been researching for a couple of days but still struggling with some basics. Trying to set up a simple 12v system, maintained by a solar panel. Solar Panel> Charge ...
1
vote
1answer
64 views

Will a diode conduct if one side is floating and one side has voltage applied to it?

I have a circuit that has a battery output voltage of about 7V and can also have a charger input that when plugged in will output around 9V. The battery/charger power a microcontroller (regulated ...
-1
votes
1answer
79 views

Can I run a 110v battery charger/maintainer off a solar panel?

I have a Batt Cat II battery charger/maintainer hooked up to the batteries on my boat. I keep it at a storage yard that doesn't have 110v outlets available. I was wondering if it is possible or ...
0
votes
1answer
75 views

pulse charging lead acid battries effects and side effects

I am developing a solar charger which charges lead acid batteries.I would like to clear a few of doubts on this issue. I am using IR2110 gate driver for driving 2 n-channel mosfets in an half bridge ...
0
votes
2answers
26 views

Output charger indications

its a small question ...i got on my cell charger the indications as follow: input:100-240 V 50-60 Hz output: 5 V DC 1 A.... the question is what does the 1 A mean? i am new to circuits and ...
7
votes
2answers
384 views

What is the purpose of these forks?

I have disassembled a phone charger today and I have found some interesting feature that I do not understand, I have marked it on the picture. Left side of this structure is connected to P1, that is ...
0
votes
1answer
90 views

Making a universal USB charger

I would like to make an universal USB charger. I have a 5V, 2A max generator and I can not find any electronic assembly to create a Dedicated Charging Port able to charge Samsung, Apple and other ...
0
votes
2answers
55 views

DC-DC & Solar Question

I normally am pretty good with electrics and they taught us about them in a few of my classes, specifically my into to engineering courses. I however don't know a ton about solar panels so this ...
-3
votes
1answer
61 views

can i use a 20V, 2.0A for my laptop that needs 19V, 4.74 A? [closed]

i have a laptop that needs 19V and 4.74A my laptop's charger broke and i replaced it with a 20V and 2.0 A the laptop seems fine but i noticed that the charging goes on and off for like an interval or ...
-1
votes
1answer
30 views

18v nimh battery charger [duplicate]

For the 18V +/- NIMH battery pack (2 x 9V packs in series @ 200mAh) that I use to run my phono preamp, I need a simple trickle charge circuit. The LM317 IC seems to be the one that is used a lot. ...
0
votes
2answers
46 views

In a power supply, the current is a constant or gives whats the component/circuit need ? [duplicate]

I everybody, sorry for my english :D . i'm a begginer of electronic and i'm learning a lot of electronic component, voltages, current and so on. My question is about a charger (phone charger for ...
0
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0answers
47 views

Be on the safe side with 12 v battery as powersupply

I have a 12 v battery connected to a LI-PO charger that uses 1.5A. Now i want to make sure i'm not going to fry anything so i want to connect a fuse. Question 1. How do i calculate the value of the ...
0
votes
1answer
79 views

What's the purpose of this bulky cylindrical part near the plug end of a laptop charger cord? [duplicate]

I want to fix my laptop charger cord, I used a multimeter to check the voltage and it gives me less than one volt. It feels very flexible near the plug, but I don't know if I can cut before or after ...
2
votes
1answer
105 views

How to get 5V 4A from two 5V 2A chargers

I have two 5V 2A chargers. I want to get 5v 4A. Can I connect both in parallel like this?: simulate this circuit – Schematic created using CircuitLab Can I do it? Because in parallel ...
1
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2answers
51 views

Detecting HI-Z state of charge controller

I have been building a Li-Ion charge controller with MCP73831. The STAT pin has 3 states as shown below: The circuit I come up so far is this: Is there a way to detect the HI-Z state with ...
1
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1answer
69 views

Variable Current Lead Acid Battery Charging

I'm designing a solar controller in order to charge SLA batteries. I did some research on dedicated ICs that act as controllers, and found that most implement some sort of MPPT, in order to extract ...
0
votes
0answers
64 views

Can I decrease volts to increase amps

I made a solar USB charger that uses an LM2596S variable voltage regulator to decrease the ≈22V to 5V. It works fine for my older devices but lacks to current to activate the charge mode on my ...
1
vote
1answer
68 views

Why do laptop batteries and chargers differ in voltage output?

As an example, my laptop's charger gives out 19,5V and 3.42Ah while it's battery gives out 11,1V and 2.2Ah, what's going on exactly?
0
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1answer
74 views

charging circuit for series coin batteries

I am designing a circuit that will be powered by two rechargable coin cells in series, and I need to include a module to recharge them in-situ. I have had a look on RS at the range of rechargable ...
1
vote
1answer
103 views

Solar charging using or not using a dummy (dump) load

I'm in the process of designing a small solar regulator / charger (no more than 5A) for sealed lead acid batteries. I have put a working prototype together and all seems to be working. However, ...
0
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0answers
35 views

How to rewire a 6-port usb charging hub

For a project in school I am building a product which displays and charges any device which can run from a usb port. The problem is that I have the holes for the usb ports cut out of custom positions ...
0
votes
1answer
64 views

Operation of a micro USB phone charger outside its limits

Many micro USB phone chargers give 5V DC and 1500 mA output at input 100-240 V AC at 50-60 Hz (these values are from a Sony EP 880 charger). What happens to the output when voltage rises above 240 and ...
0
votes
2answers
86 views

Triac circuit confusion

X1Iz.png I have the following questions about the above circuit: -Why are we even using a trica/diac combo above. Why would a circuit consisting of just the fuse, switch and primary not be ...
0
votes
1answer
211 views

Looking for circuit diagrams of current mobile phone chargers [closed]

I am writing an investigation into how a mobile phone charger works and I'm required to break down the internals with a block diagram with component explanations. To help get me on track I'm looking ...
0
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0answers
72 views

Solar panel - voltage regulator

I am contemplating the possibility to run a trolling motor (to push my canoe) with a 250W solar panel. Electrical Specifications: Peak power: 250 W (minus 0, plus 5W Tolerance!) Optimum operating ...
0
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1answer
143 views

Solar Charge Controller Function Details

I am planning to make this controller: I would like to understand the way the components work to switch from charging to dumping and vice versa at set points. Note that the 555 timer is not being ...
1
vote
1answer
36 views

Will the charging current decrease due to a higher input resistance?

I am trying to design a board with USB powered linear battery charger IC charging a 3.7v Li-ion battery. I am concerning about the the relationship between charging path resistance and the maximum ...
0
votes
2answers
510 views

What happens if you put the connector of a live charger in your mouth?

So what exactly would happen if you put the connector of a plugged-in charger in your mouth? I am sure it is a bad idea but can it really hurt or even kill you? Some posts on social media led me to ...
0
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0answers
30 views

Finish of charging

Is it possible to determine the fact charger has finished it's work (accumulator unplugged or charged) by any metrics in AC circuit? History of metrics is also available. Can this be resolved in ...
0
votes
2answers
49 views

Possible to charge a phone battery by using built in contacts? [closed]

Recently I had a Plum Coach Plus II handed down to me because a family member broke the charger port on the device. I managed to charge it after a few minutes of propping and plugging in the cable ...
2
votes
4answers
935 views

How to autoregulate a TP4056 for maximum solar power extraction

I'm using a solar panel (6V - 600mA at peak power) to charge a Li-Ion (3.7V) battery using a TP4065. The TP4065 I'm using has this configuration: Where the value of the resistor Rprog determines ...
1
vote
0answers
30 views

Creating a switch between USB and USB OTG for phones [duplicate]

I'm trying to create a charger that knows how to switch between OTG and charging mode. The OTG side is working, and my Samsung S4 goes into charging mode. However, charging is really slow. It even ...
1
vote
2answers
52 views

Do chargers use power when they're not charging? [duplicate]

1) If I connect my mobile charger to a wall socket and it is switched on, but I don't connect my mobile to the charger, does the charger still use electricity? 2) If I connect an extension box to a ...
2
votes
1answer
127 views

how can I hack a usb charger to work with ALL phones and specifications

perhaps I am asking for too much. Please do tell. So I have a few usb chargers laying around. I realised that in these chargers I can charge iPhones and I can ...
-1
votes
1answer
50 views

What is “ol plug-it-in” as a charge approach?

I'm reading an article which is about wearable smart watches. In the following context author says Sony SmartWatch 3 uses ol' plug-it-in approach for charging, I ...
0
votes
0answers
352 views

Solar charge controller circuit for LiFePO4 (or possibly NiMH batteries)

Would someone happen to know of a circuit board for charging LiFePO4 batteries from solar panels. Or alternatively a simple circuit schematic for building one? I would like to use 2 LiFePO4 ...